Lawn mower sharpener



wmggg `une l l, 1940.

H. w. BEAVER 2,204,293

LAWN MowER SHARPENER Filed May l2, 1959 2 Sheets-Sheet l By ma A TTORNEYS.

june 1l, 1940. H wl BEAVER v 2,204,293

LAWN MOWER SHARPENER Filed May 12, 1959y 2 sheets-sheet 2 #e i. "gn W I N :i g:

fllffj A f Q @J 3 nur a -Y N y Y m Nr I v n 7 I i fl 7 w 1| y@ N kmx- ATTORA'EYS.

Patented June 11, 1940- 'Ihis .invention aimsto provide novel means for supporting and anchoring a'lawn mower, and to provide novel means for turning the cuttingrotor .of `the mower, tothe end that emery or some `other abrasive substance, placed on lthe l'ixedshear "of the mower,v will cooperate withl .the blades of the rotor, to sharpen both the shear and the blades.

It iswithin the province. of the disclosure to ,improve generally and .to enhance the utilityV of devicesof that type to which the present invention appertains. v.

jWith the above and other objects in view,v

which will appear `as the description proceeds, the invention resides `in the vcombination and arrangement ofparts and rin the details ofco'nstruction :hereinafter ldescribed and claimed, it being understoodv that changes vin the vprecise embodiment of `the invention herein disclosed, may bemadewithin thescope of what is claimed, without departing from the lspirit of .thefinvention.v

In the drawings: v

Fig. l is a side elevation, wherein parts are sectioned;

Fig.,2 is a top plan :in which parts are broken away.

In carryingout the invention there is provided a frame F, including a vertical arch I having legs' 2, provided with verdeel 51ers 3. Horizontal angle brackets 4 are secured to the legs 2, and to the inwardly projecting arms of the angle brackets, a horizontal table 5 is rigidly secured, the forward end of the table carrying a leg 6, the legs 2 and 6 giving a three-point support support for the frame F.

A mower mount is supplied and includes parallel side bars 'I having outwardly projecting Vlateral extensions 8. The forward endsof the side bars I are'connected to the legs 2 by wing bolts 9 located in the slots 3 of the legs 2. Legs v IIJ are provided, and have vertical slots II, re-

ceiving wing bolts l2 mounted in the side bars l.

The mower mount, in Aviewv of the foregoing de# scription, is vertically adjustable, in order to position properly, the mower which it carries.

The mower is designatedby the letter Mr and includes ground wheels I4, a crossv rod I5, a e

ground-engaging roller I6, a fixed shear I1, and a rotor I8, including spiral blades I9which cooperate with the fixed shear I'I in a well known manner.' Y

The ground wheels I4 of the mower M rest on the extensions 8 of the side bars/'I of the mower "the, drums -22 are, turnedL-rotation'will be irnparted-to the rotor I8, the blades I9 `moving over coverings 23 of the drums 22. y

mount the ground-engaging .roller I6 resting von the Side bars 1. f

The-grinding operation is carried out by put'- -ting abrasive material, such as emery dust, on

the :fixed shear :I 1, rotation xbeing imparted tothe member I8, both the blades I9 and the shear I1 beingsharpened .at once, `as the blades sweep 'over the shear I'I, laden with =emery dust.,` The ydust falls into aremovable pan 2l), -located be" neath the side bars ,'I of the motor mount. i

10 As to the means wherebythe rotor.V I8`is caused :to turn, a` driven shaft 2-I is journaled inthe brackets 4 landinflthe 'legs 2. -The shaft 2|r is secured to theouter heads of driving drums 22, the drums being openV atv :their inner ends, and being, spaced apart atytheir inner ends.- The drums 2,2` are providedffwith friction coverings 23 f made of rubber .or the liker and; adapted to secure .a gcodholdeon-the blades l 8, so'that when the shear I'I, and sharpening being effective-in the manner hereinbeforepointed out. f

, In order tor secure an intimate driving contact between the `coverings .23 of ythev drums Z22 and .'25 thehlades I.9 `of .the rotor .I8,-the'-cross,rod |15 of. the vmower is received in notched saddles 24,

held on draw rods 25, for adjustmentdongitudinally thereof, through the instrumentality of set screws '26. The draw rodsv 25 have longitudi.. nal movement injthe upper portion of the arch I, but the rods are threaded at their front ends to cooperate with tightening wheels 21, which, engaging the arch I, .advance the rodsA 25 and theseddies 24, and reuse the meses Vleef the rotor I8 to have driving engagement withthe A gear housing 28 issupported bythe shaft ZI, and the shaft 2| turns in the gear housing. Since the drums 22 are openat their innerends, they receive and accommodate the gear housing 28, as Fig. 2 will show. Secured to the shaft 2|, within the housing 28, is a worm wheel` 29", cooperating with a worml shaft 3l),y arranged at right angles tothe shaft 2l and supported for rotation in the housing 28, the inner ends of the drums 22 being spaced to receive the worm shaft 30. yA coupling 3l connects the worm shaft 3U with the shaft ofgan' electric motor 32, secured to the table 5.

The motor 32 50 turns the worm shaft 30, the

" worm'sheft drives the shaft 2| by way of the worm wheel 29 the lshaft 2I rotatesy the drums 22, the facings 23 impart rotation to themem-y ber I8, by contact withthe bladesl I9', and as the 55 blades sweep over the emery-laden shear I1, a sharpening of both the shear and the blades I9 is effected.

The device is simple in construction, but will carry out a lawn mower sharpening operation in a satisfactory and expeditious manner.

Having thus described the invention, what is claimed is:

l. In a machine for sharpening a lawn mower by cooperation between the blades of the rotary cutter and the shear of the mower, a frame, a mower mount associated with the frame, a rotary driven member journaled on the frame, means for holding the blades of the rotary cutter of a mower carried by the mount, in engagement with the periphery of the driven member, and means for rotating the driven member.

2. In a machine for sharpening a lawn mower by cooperation between the blades of the rotary cutter and the shear of the mower, a frame, a mower mount associated with the frame, a rotary driven member journaled on the frame, means for holding the blades of the rotary cutter of a mower carried by the mount, in engagement with the periphery of the driven member,I a motor mounted on the frame, and a driving connection between the motor and the driven member.

3. In a machine for sharpening a lawn mower by cooperation between the blades of the rotary cutter and the shear of the mower, a frame including an upright member, a mower mount associated with the up-right member, a rotary driven member journaled on the upright member, means adjustable in the upright member for holding the blades of the rotary cutter of a mower carried by the mount, in engagement with the periphery of the driven member, a motor, means for supporting the motor from the upright member, the last-speciiied means, and the upright member forming a support for the machine, and al driving connection between the motor and the driven member.

4. In a machine for sharpening a lawn mower by cooperation between the rotary cutter and 4the shear of the mower, a frame, a mower mount associated with the frame, a rst shaft journaled in the frame, drums secured to the first shaft and separated at their inner ends to form a space, means for holding the rotary cutter of a mower carried by the mount, in engagement with the drums, a second shaft supported for rotation in said space, a driving connection between the shafts and located in said space, and means for rotating the second shaft.

5. In a machine for sharpening a lawn mower by cooperation between the rotary cutter and the shear of the mower, a frame, a mower mount associated with the frame, a first shaft journaled in the frame, hollow drums secured to the first shaft and separated at their inner ends toy form a space, means for holding the rotary cutter of a mower carried by the mount, in engagement with the drums, a gear housing carried by the rst shaft and accommodated within the inner ends of the drums, a second shaft supported for rotation in the gear housing and extended into said space, gearing connecting the shafts and disposed within the gear housing, and means for rotating the second shaft.

6. In a machine for sharpening a lawn mower by cooperation between the rotary cutter and the shear of the mower, a frame, a mower mount, a rotary driven member journaled on the frame, means for holding the rotary cutter of a mower carried by the mount, in engagement with the driven member, means for rotating the driven member, and means for connecting the mount with the frame, for raising and lowering, thereby to position the rotary cutter of a mower for engagement with the driven member, at the periphery of the driven member.

7. In a machine for sharpening a lawn mower by cooperation between the rotary cutter and the shear of the mower, a frame, a mower mount associated with the frame, a rotary driven member journaled on the frame and having a resilient friction covering, means for holding the rotary cutter of a mower carried by the mount, in engagement with the covering, and means for rotating the driven member.

HARTSELL W. BEAVER. 

